86 lines
2.6 KiB
C++
86 lines
2.6 KiB
C++
/*****************************************************************************
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*
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* This file is part of Mapnik (c++ mapping toolkit)
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*
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* Copyright (C) 2011 Artem Pavlenko
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*****************************************************************************/
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#include "dataset_deliverer.h"
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#include "basiccurl.h"
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#include <sstream>
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osm_dataset * dataset_deliverer::dataset = NULL;
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std::string dataset_deliverer::last_bbox = "";
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std::string dataset_deliverer::last_filename = "";
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osm_dataset* dataset_deliverer::load_from_file(const string& file, const string& parser)
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{
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// Only actually load from file if we haven't done so already
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if (dataset == NULL)
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{
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dataset = new osm_dataset;
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if (dataset->load(file.c_str(), parser) == false)
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{
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return NULL;
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}
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atexit(dataset_deliverer::release);
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last_filename = file;
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}
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else if(file != last_filename)
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{
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dataset = new osm_dataset;
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if (dataset->load(file.c_str(), parser) == false)
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{
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return NULL;
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}
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last_filename = file;
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}
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return dataset;
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}
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osm_dataset* dataset_deliverer::load_from_url(const string& url, const string& bbox, const string& parser)
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{
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if (dataset == NULL)
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{
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dataset = new osm_dataset;
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if (dataset->load_from_url(url.c_str(), bbox, parser) == false)
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{
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return NULL;
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}
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atexit(dataset_deliverer::release);
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last_bbox = bbox;
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}
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else if (bbox != last_bbox)
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{
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#ifdef MAPNIK_DEBUG
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std::cerr << "Osm Plugin: BBOXES ARE DIFFERENT: " << last_bbox << "," << bbox << std::endl;
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#endif
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// Reload the dataset
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dataset->clear();
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if (dataset->load_from_url(url.c_str(), bbox, parser) == false)
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{
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return NULL;
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}
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last_bbox = bbox;
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}
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return dataset;
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}
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